We can share the internet connection using airport, Here is the procedure:

1) Go to system preferences->sharing->internet sharing (a tab in Tiger or it is in the list in Leopard)2) Under the pull down labeled "Share you connection from" choose ethernet. In the list below check the airport box. Click start.

If you have custom ipfw policy, need to add following 2 rules:

ipfw add allow ip from any to any via wlt*ipfw add allow ip from 10.0.0.0/8 to any

You need to make sure the wireless network is accessable only for the trusted computer!

However, there is one aspect that linux lead against all other OSs in software upgrade, as the OS distributor don't really develop the core of the system. They all putting a lot of effort of package management, turn out there are really nice approach coming out from Linux world, like debian APT or gentoo's Portage. Manage individual software is much easier

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